CN102900438A - Residual coal full-mechanized repeated mining method of near-distance inflammable seam gob - Google Patents
Residual coal full-mechanized repeated mining method of near-distance inflammable seam gob Download PDFInfo
- Publication number
- CN102900438A CN102900438A CN2012103843293A CN201210384329A CN102900438A CN 102900438 A CN102900438 A CN 102900438A CN 2012103843293 A CN2012103843293 A CN 2012103843293A CN 201210384329 A CN201210384329 A CN 201210384329A CN 102900438 A CN102900438 A CN 102900438A
- Authority
- CN
- China
- Prior art keywords
- coal
- seam
- mining
- adopt
- support
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Landscapes
- Excavating Of Shafts Or Tunnels (AREA)
Abstract
The invention provides a residual coal full-mechanized repeated mining method of a near-distance inflammable seam gob, which aims to solve the problem of resource loss, natural inflammation and gas discharge difficulty in mining a near-distance underlying seam above which a tool post gob covers. The method comprises the following steps that: upper coal covering pillars are put when a lower seam is mined; a staggered roadway arrangement method is adopted, i.e. an air inlet transportation roadway is arranged in an underlying seam, and tunneling along with the bottom is performed; an air return transportation roadway is arranged in an upper covering seam, and tunneling along with the top is performed; and a process procedure combining a mode that one upper coal covering pillar is put while mining for twice and a mode that one upper coal covering pillar is put while mining for one time is adopted in a working plane, i.e. when the whole seam is not mined, one upper coal covering pillar is put while mining for twice, and when the whole seam is mined in different layers, one upper coal covering pillar is put while mining for one time. With the adoption of the method, the recycling of residual coal is realized while new seams are mined, so that not only is the non-renewable coal resource saved, but also the service life of a mining well is prolonged, and the resource recycling efficiency is significantly improved.
Description
Technical field
The present invention relates to the mining methods method, specifically the residual coal in a kind of low coverage inflammable seam goaf is combined the second mining method of putting.
Background technology
Coal is the topmost primary energy of China, also is non-renewable limited resources.For a long time, coal accounts for the proportion more than 70% in the production of China's primary energy consists of with consumption, has guaranteed the needs of national economy fast development.Coming few decades world energy sources and the energy source in China demand all with sustainable growth, from the angle of energy security and economical rationality, domestic energy breach also mainly relies on coal to solve.This is to deposit objective condition by the resource tax of the rich coal of China, oil starvation, weak breath to determine.Even the coal that relatively enriches, China occupancy volume per person also only is half of world average level, and the coal resources recovery ratio of mine only has 1/2nd of developed country.Therefore, improve coal resources recovery ratio and utilization ratio, make precious non-renewable energy resources resource obtain the most sufficient utilization, for the sustainable and healthy development that guarantees Chinese national economy very important meaning is arranged.
The close-in seams exploitation more and more draws attention in China in recent years, it is very large that proportion is deposited and exploited in China's contiguous seams tax, all there is the problem of mining of closed distance coal seam group in the mining area mostly, such as Datong Mine Area, Xishan mine, Xin Fen mining area, Pingdingshan Coal Mine, Huainan Mining Area etc.These coal seam interfloor distances are near, and fork merges frequent.About the full seam extraction of close-in seams, substantially all to divide with coal seam up and down and adopt or adopt traditional caving coal technology back production, these technology are also comparative maturity at home and abroad.Deposit and many than above-mentioned complexity of exploitation situation and compose for the close-in seams of some mine.Such as Panzhihua Mineral Bureau, Sichuan Hua Shan colliery, the Ju Shan colliery of Jincheng Mining Area etc.Xishan mine is ubiquity 8 then
#, 9
#Close-in seams covers in history many employing tool post formulas exploitation of coal seam on these mines, such current mining has produced adverse effect to the safe working of covering down the coal seam.
At present, have the mine that covers for the tool post goaf and substantially all adopt and only adopt underlying seam, and abandon the exploitation method of the residual coal of tool post.Take Xishan mine Bai Jiashan ore deposit as example, this ore deposit 9
#Coal is to stablize minable coal seam, on it for the 60 to 70's of last century adopted 8
#A large amount of residual coals are left in coal tool post goaf.Former tool post work plane across pitch, tendency interlaced arrangement do not have regularity, give 9
#The coal face of assigning a work causes difficulty.In history 8
#With 9
#The coal seam is independent exploitation, because of 8
#Coal is the spontaneous combustion coal layer, through the long oxidation behind the knife mining, very easily spontaneous combustion.Xishan mine is extensively composed and is deposited 8
#, 9
#Coal seam group with near interval, the similar adjacent pit mining 9 of condition
#During the coal seam, in-plant 8
#Tool post residual coal in coal seam all falls into 9
#Goaf, ignition issues are very serious, once have a plurality of work planes to seal because catching fire and stop adopting.As singly adopting 9
#Coal seam and abandon 8
#Resources loss is not only continued to cause in the coal seam, and the spontaneous fire problem also will affect 9
#The normal exploitation of coal.If adopt traditional top coal caving, two lanes are along backplane, 8
#The gas that the tool post space in goaf is gathered for many years will be difficult to discharging; Work plane two ends transition bracket and tunnel be Sub-Level Caving not, still has more loose float coal loss, strengthens spontaneous fire hidden danger; Because 8
#With 9
#Between be that one deck average thickness is the sandstone of 0.8m, also should take into account when selecting the tunnel to arrange and consider broken this layer sandstone.
Summary of the invention
The objective of the invention is to solve the resources loss, spontaneous fire and the drawing-off gas hard problem that exist when covering for the exploitation of the low coverage underlying seam in tool post goaf, provide the residual coal in a kind of low coverage inflammable seam goaf to combine the second mining method of putting.
For achieving the above object, the technical solution used in the present invention is:
The residual coal in a kind of low coverage inflammable seam goaf is combined and to be put the second mining method, adopts underlying seam and puts and cover coal column, may further comprise the steps:
(1) roadway workface is arranged
Adopt the staggered floor tunnel to arrange method, i.e. air intake transportation lane is positioned at underlying seam, with end driving; Return air haul lane is arranged in covers the coal seam, with the top driving;
(2) coal-mining method
Work plane adopts two to adopt one and put with one and adopt one and put the technological process that combines, and two did not adopt one and put when whole layer was adopted, and one adopted one and puts coal cutting step pitch 0.6m, unit advance 0.6m when layering was adopted; Specifically comprise:
1) termination lapping
Lay the top net at face end, lapping was carried out before coal cutting, adopted the metal rhombus net of 7500 * 700mm.During lapping, long limit is parallel to work plane, overlaps 100mm between net and the net, and networking adopts the iron wire of bifilar long 300mm to kink, and connects a place every a hole, and every place three circles of twisting together at least, net connection retract net after well and sling;
2) feed
Adopt head, tail to cut the feed mode of cutting sth. askew of Triangle Coal;
3) coal cutting
After the coal-winning machine feed, enter normal coal cutting state, adopt front roll to cut the top coal during coal cutting, back roll cuts the method for ground coal and carries out operation;
4) stretch extensible canopy
After the coal mining machine cut is crossed coal, stretch out the support extensible canopy apart from coal-winning machine front roll 2-3 frame, in time protect top, machine road top board, prevent inbreak;
5) move frame
The mode operation of adopting this operation, the machine of chasing after to move frame, 2-3 sliding advance of support of hysteresis coal-winning machine back roll;
6) pass anterior conveyer
Use hydraulic support foundation middle part advancing jack is passed anterior conveyer, and with adopting the machine cut coal, the machine of chasing after begins the top slide after pulling out 10 framves, top slide step pitch 0.6m;
7) Sub-Level Caving
Adopt single-wheel sequentially to put coal, drawing interval 0.6m is put coal after utilizing the loosening top board of mode that roof pressure, support support repeatedly, the support tail boom swings up and down and reclaim plate, until see till the superjacent top board limestone spoil;
8) draw and move the rear portion conveyer
Use the other hydraulic jack of hydraulic support foundation to draw and move the rear portion conveyer, discharge the top coal after, begin to draw and move the rear portion conveyer apart from putting coal point 15m, draw and move one's steps apart from 0.6m.
Adopt method of the present invention, when adopting new coal seam, realized the recovery to residual coal, not only saved non-renewable coal resources, and prolonged mine service-life, increase substantially resource recovery.Also solve simultaneously gas and residual coal ignition issues that Overburden gob area gathers for a long time, realized safety in production.Concrete innovative point is embodied in:
1) proposes first the residual coal of the complicated occurrence patterns of low coverage (1.1m contains false roof 0.3 m) inflammable seam Overburden gob area and combine second mining theory and the method for putting.
2) propose first and the residual coal second mining of successful Application low coverage condition under tunnel, staggered floor position placement technique, the residual coal of low coverage tool post, the residual coal of lower leaf, low coverage primitive coalbed condition is all applicable.
3) by adopting tunnel, staggered floor position to arrange and the syllogic process for stoping, play slope section cutting dirt band, increasing the scope of freedom of top coal and dirt band, realizing the Sub-Level Caving second mining under thick-layer dirt band (low coverage) condition; And with the coal extraction of top, termination, work plane is laid a good foundation without coal pillar mining in order to continue; Formed the complete practical art technology of the inflammable residual coal second mining of low coverage.
4) propose to eliminate technical thought and the implementation method that easy spontaneous combustion float coal is the basic prerequisite of control spontaneous fire, founded brand-new residual coal second mining preventing and extinguishing fire technology system.Disclosed the mechanism of longwall top coal caving roadway roof coal, face end, adjacent goaf three fiery homologies, and with a small amount of nonflammable lower course of solid coal, cover inflammable loose float coal on having replaced that traditional top-coal caving face termination must form, thereby administered the common source of three place's spontaneous fires, made ignition issues obtain the essence containment.
5) not only play the spy lane effect of detection of coal seam spacing along the top board return airway, and solved the emission problem of goaf accumulated methane, saved special-purpose gas-removing lane.This tunnel, staggered floor position is conducive to driving and safeguards.
6) in the residual coal second mining roadway system of staggered floor position, return airway is arranged along top board, and not jacking coal can effectively reduce the termination operation and produce dirt, is conducive to synthesis dust prevention.
Description of drawings
Fig. 1 is that roadway workface is arranged schematic diagram.
The specific embodiment
Below in conjunction with the actual conditions in Coking Coal Group Bai Jiazhuan ore deposit, the claimed technical scheme of the present invention done specifying.
1. work plane geological conditions
Bai Jiazhuan ore deposit 39713 work plane ground locations are positioned at smelting valley ventilating shaft western mountainous areas, and the down-hole is positioned at hole, south 1001 levels, seven panel right flanks, and the work plane ground level is 1225-1325m, down-hole absolute altitude 1016-1050m, lid mountain thickness 109-275m.Its front portion is an irregular karst collapse col umn; The rear portion is large lane protection coal column; Anterior left side is 39501 mining faces, in, the left side, rear portion is the unworked country, right part is a fault belt and 39701 work planes; Front upper is 38502 tool post formula goafs; In, rear portion top is 38713 work plane higher slice goafs.
1.1 ocurrence of coal seam situation
This ore deposit 9
#Coal is to stablize minable coal seam, cover the coal seam on it and be adopted in the 60 to 70's of last century 8
#A large amount of residual coals are left in coal tool post goaf.9
#The coal average thickness is 2.4m, and ocurrence of coal seam is stable, seam inclination 4o～8o, average 6o.
1.2 9
#Top, coal seam, base plate situation
Work plane immediate roof lithology is sandstone, thickness 0.05-1.6m, and average thick 0.8m is black, and particulate is to affect 8
#Coal is emitted the principal element of effect.Other has one deck shale false roof, and average thick 0.3m is black, and property is crisp, with adopting with emitting, sneaks in the coal, on putting coal without impact.Directly bed rock is shale, and thickness 0.3-0.7m is black; Past is arenaceous shale, is Dark grey, and bedding is clear.
1.3 geological structure situation
39713 work planes are 9
#Working face of coal seam, this work plane geological structure situation is simple, positive lane runs into four normal faults of F1-F4 in driving, pay a lane and run into two normal faults of F5-F6, tomography on back production without impact.
1.4 hydrogeological situation
39713 work planes hydrogeology situation is simpler, and top, 150-340m place has a place to adopt sky ponding before the aperture position of positive lane, the about 10500m of ponding area
2, the about 6300m of water accumulating volume
3Water surface absolute altitude 1024 m, pools zone and work plane distance are 2.2～3.0m.580-640m place before the aperture position of positive lane, top has a place to adopt sky ponding, about 1484 m of ponding area
2, about 1603 m of water accumulating volume
3, water surface absolute altitude 1027m, ponding and this work plane distance are 1.3～2.0m.The work plane maximum flooding quantity is 0.4m
3/ min, normal water yield 0.05 m
3/ min.
1.5 other situation
Estimate work plane 9
#Absolute outburst amount 0.23 m of coal-bed gas
3/ min.Because 8
#There is the goaf in the coal seam, and especially the tool post that is not caving of top board is adopted absolutely empty, with having the gas that gathers for a long time, may reach higher concentration; Coal dust has explosivity, and explosive index of coal dust is 13.31; 9
#Coal seam ignition tendentiousness is accredited as three classes and is difficult for spontaneous combustion.But 8
#The easy spontaneous combustion in coal seam, spontaneous combustion period are 6 months.
1.6 work plane deployment scenarios
1.6.139713 roadway workface is arranged
39713 roadway workfaces arrange and adopt tunnel, staggered floor position to arrange method that i.e. air intake transportation lane is positioned at 9
#In the coal seam, with end driving, return air haul lane is positioned at 8
#In the entity coal of coal seam, with the top driving.Concrete tunnel deployment scenarios is seen Fig. 1.
1.6.2 return airway section, support form
The work plane haulage gate adopts trapezoid section, mining 11
#Personally canopy supporting of i iron; The track crossheading adopts rectangular cross section, full anchor supporting.The roadway support parameter sees Table 1.
Table 1 tunnel parameter list
2 parameters of mining faces, lectotype selection and coal winning technology
2.1 parameters of mining face
Work plane can be adopted strike length: mainly determine that according to factors such as work plane coal seam geological condition, ocurrence of coal seam situations can adopt strike length is 720m;
Work plane is adopted length: mainly determine that according to the factors such as ability of work plane coal seam geological condition, ocurrence of coal seam situation and equipment length is 150m;
Work plane mining height: mainly determine that according to factors such as the air-conditioning requirement of work plane, the stability of caving roof coal hydraulic support, the stability of rib, reasonable taking and placing aspect ratio and work plane reasonable operation spaces mining height is 2.4m.Parameters of mining face sees Table 2-1.
Table 2-1 parameters of mining face table
| Can adopt and move towards long (m) | Adopt long (m) | Follow into (m) | Coal thick (m) | Mining height (m) | Unit weight (t/m 3） |
| 720 | 150 | 0.6 | 2.4 | 2.4 | 1.34 |
2.2 work plane corollary equipment design
What 39713 work planes adopted is that coal-mining method is arranged in tunnel, staggered floor position.MG-200 type coal-winning machine breaks coal, coalings, each SGZ-630 type flexible flightconveyor fortune coal before and after the work plane.Work plane adopts ZF3000/16/25 type sublevel caving hydrau lic support supporting roof, and frame head and tail respectively adopts 4 groups of Л beams of 2 ZFG3600/17/26 type support assorteds to carry out end support, and the roof control method is whole caving methods.Adopt to combine adopt the low caving coal technology on cover 8
#Coal reclaims, and adopts 9
#Coal puts 8
#Coal.
The work plane corollary equipment sees Table 2-2.
Table 2-2 work plane corollary equipment table
2.3 working surface hydraulic support
Choose ZF3000/1.6/2.5 type sublevel caving hydrau lic support as the support of 39713 work planes.The major metal structural member has: extensible canopy, back timber, caving shield, tail boom, plate, front-rear linkage, base, pusher rod and side guard board etc.
Hydraulic package mainly contains: column, various jack, Hydraulic Conirol Unit (control valve, one way valve, safety valve) etc., hydraulic pressure auxiliary tool (sebific duct, elbow, threeway and atomizing de-dusting apparatus) etc.
The support tail boom is the critical component that protects the top and realize Sub-Level Caving, and its Main Function comprises:
1. support loosening top coal and balkstone, the good working space of maintenance;
2. for plate provides fulcrum, create conditions for realizing broken top coal;
3. by regulating tail boom jack swing tail beam, can become flexible the top coal and put coal, gear cash.
Because the impact that tail boom will bear top coal and balkstone is so will there be enough Rigidity and strengths.This support tail boom adopts whole box-shaped to become section structure, forms with steel plate butt welding.
Plate: plate is linked to each other with tail boom by the plate jack, is in tail boom inside, is the direct parts of realizing Sub-Level Caving.
Its Main Function has:
1. regain plate and realize Sub-Level Caving;
2. stretch out plate and stop that spoil enters the rear portion conveyer;
3. when having coarse coal to fall, utilize the plate pointed tooth can be with lump coal breaking.
Design parameter sees Table 2-3.
Table 2-3 support parameter list
| Sequence number | Project | Parameter | Unit | Sequence number | Project | Parameter | Unit |
| 1 | Support height | 1.6～2.5 | m | 6 | Working resistance | 3000 | KN |
| 2 | Support width | 1.43～1.6 | m | 7 | Supporting intensity | 0.56～0.59 | MPa |
| 3 | Transportation clearance | 5.2×1.43×1.6 | m | 8 | Pump station pressure | 31.5 | MPa |
| 4 | Frame center to center distance | 1.5 | m | 9 | Weight support frame | 9.5 | T |
| 5 | Setting load | 2532 | KN |
2.4 coal winning technology
Work plane adopts two to adopt one and put with one and adopt one and put the technological process that combines, and two did not adopt one and put when whole layer was adopted, and one adopted one and puts when layering was adopted.
Coal cutting step pitch 0.6m, unit advance 0.6m.Concrete technology is as follows:
1) termination lapping
The 4 groups of Л beams in three in termination supports of this work plane and termination are laid the top net, and lapping was carried out before coal cutting.Adopt the metal rhombus net of 7500 * 700mm.During lapping, long limit is parallel to work plane, overlaps 100mm between net and the net, and 14 of bifilar long 300mm is adopted in networking
#Iron wire kinks, and connects a place every a hole, and every place three circles of twisting together at least after the net connection is good retract net and sling.
2) feed
Adopt head, tail to cut the feed mode of cutting sth. askew of Triangle Coal.
3) coal cutting
After the coal-winning machine feed, enter normal coal cutting state.Adopt front roll to cut the top coal during coal cutting, back roll cuts the method for ground coal and carries out operation.
4) stretch extensible canopy
After the coal mining machine cut is crossed coal, stretch out the support extensible canopy apart from coal-winning machine front roll 2-3 frame, in time protect top, machine road top board, prevent inbreak.
5) move frame
Adopt this operation, the machine of chasing after to move the mode operation of frame.2-3 sliding advance of support of hysteresis coal-winning machine back roll.
6) pass anterior conveyer
Use hydraulic support foundation middle part advancing jack to pass anterior conveyer, with adopting the machine cut coal, the machine of chasing after begins the top slide after pulling out 10 framves.Top slide step pitch 0.6m, scraper-trough conveyer bending section length is not less than 15m.When the top slips, operate the pushing and sliding jack of 3-5 framves at every turn.
7) Sub-Level Caving
Adopt single-wheel sequentially to put coal, drawing interval 0.6m.Put coal after utilizing the loosening top board of the comprehensive methods such as roof pressure, support support repeatedly, the support tail boom swings up and down and reclaim plate.Put coal and begin to chase after machine by frame order Sub-Level Caving, until see 8 from the 4th of head (tail)
#Till the coal top board limestone spoil.
When putting coal, should avoid the spoil at rear, goaf to pour in first coal discharge outlet, prevent that again the top spoil from pouring in first coal discharge outlet, drawing interval is too large, the spoil of top board direction will arrive coal discharge outlet prior to the coal at rear, goaf, force coal discharge outlet to be closed, and increase the back coal and decrease.Drawing interval is too little, and the spoil at rear, goaf arrives coal discharge outlet prior to top, top coal, and top, part top coal is truncated in the goaf.Drawing interval is the function of many variables of roof coal caving angle, top coal thickness, support drawing opening position, according to actual conditions and theoretical derivation that the coal work plane is put in China, when determining drawing interval, can use for reference following relational expression:
L=（0.15～0.20）h
In the formula: L-drawing interval, m;
H-support is to the vertical height at top, coal seam, m.
8
#, 9
#During the coal seam back production, need to consider that three kinds of situations carry out, both 8
#The whole layer in coal seam do not adopt, 8
#The coal seam higher slice has been adopted and 8
#The coal seam abandoned coal pillar, thereby need to determine corresponding drawing interval in conjunction with different condition.
8
#The whole layer in coal seam is not adopted, and accumulative total caving thickness is 5.1m, with reference to above-mentioned formula, in conjunction with the prevention of Spontaneous Ignition factor, can adopt two cuttves one to put;
8
#The coal seam higher slice is lost coal, can adopt a cutter one to put; It is 0.6 m that the every cutter of coal-winning machine cuts dark.
8
#Under the abandoned coal pillar condition of coal seam, because breaking of roof coal is abundant, consider the abundant recovery of coal column, can adopt a cutter one to put.
By adopting tunnel, staggered floor position to arrange method, will make dirt band be in the coal cutting scope and be cut playing the slope section during back production, thereby many scope of freedoms of this part dirt band when making adjacent stent put coal are easily broken, the favourable coal of putting.When dirt band is thicker, takes full advantage of staggered floor position roadway system and play the dirt band scope of freedom that the slope section cuts out, put coal by playing the beginning of place, slope to head successively order.
8) draw and move the rear portion conveyer
Use the other hydraulic jack of hydraulic support foundation to draw and move the rear portion conveyer.After discharging the top coal, begin to draw and move the rear portion conveyer apart from putting coal point 15m.Draw and move one's steps apart from 0.6m, bending section length is not less than 15m.
2.5 broken cash measure
In back production, the spoil varied in thickness is larger on the impact of top coal discharging amount.For this reason, reply dirt band varied in thickness problem is studied, and puts the coal good result to obtain, and following technical measures are taked in my ore deposit:
1) in support reach process, protect under the prerequisite on top, reduce as far as possible setting load, can take full advantage of focus pressure in the time of below coal column, can increase brokenly significantly dirt band thickness;
2) between two coal columns, adopt dead band, utilize the repeatedly support of support to make the dirt band fragmentation that fractures,
3) utilize tunnel, staggered floor position to arrange the sloping section scope of freedom of cutting dirt band open, begin to put successively coal from this position, it is disrumpent feelings that dirt band will be easy to.
2.6 related measure
For making the Sub-Level Caving effect reach best, following measure is made in my ore deposit:
1) after initial mining and discharging finished, the work plane eye of need prying into sought and visited 9
#The coal top plate thickness, every propelling 10m is along work plane from the 4th
#Support begins to 95
#Per 18 of support arranges that at top board is visited an eye, and the full face arranges that altogether 5 are visited eye, carries out on-the-spot record by the inspector, newspaper ground measured center.
2) perforating MZ-1.2 moulded coal electric drill, the long twist drill rods of 1.5m, the eye of in the middle of the support of sidewalk, prying into, and the result that each perforating is verified is reported the hole dispatch and the leader on duty of team.
3) owing to frequent turnover coal column during the working face extraction, Tunnel Pressure changes obviously in this process, and especially Tunnel Pressure strengthens during passing through coal column, the face timbering strength increase.For this reason, need establish the conscientious observation of special messenger, strengthen roof control, ensure safety in production.
When 4) putting coal, control the coal amount of putting into the rear portion conveyer with swinging up and down with the size of plate opening of tail boom of control, for the spoil of rock fragmentation greater than 500 * 500mm, otherwise must carry out fragmentation with sledgehammer, forbid to enter the rear portion conveyer.
The spoil of 5) emitting is by 4
#The bastard coal separation system of coal-hole carries out sorting, and discharges through waste stone exhaust system.
6) guarantee the intact of waste stone exhaust system, forbid the bulk spoil to enter coal-hole.
7) the balkstone thickness of indicating in the face roof isopachous map is less than the location of the 0.8m rice eye of can not prying into, but must the strict implement drawing coal technology, and the top coal is emitted.
8) Sub-Level Caving is only permitted to be undertaken by frame, during with the broken large rock mass of sledgehammer, must stop the running of rear portion conveyer, and latch switch.
9) reinforced support maintenance guarantees that support can both work.
Tunnel Arrangement System of Level Displacement that the present invention adopts has changed the planar system that longwall top coal caving is located at air intake and return aircourse the same layer position.Can determine to be in the different layers position of coal bed profile the roadway position of stress relaxed area.Formation three-dimensional roadway system has been realized without coal pillar mining in spatial dimension, and does not increase the difficulty of tunnelling, maintenance.Being reflected on the plane of arrangement figure of tunnel will be the staggered overlap joint of adjacent two work planes.This system usually stay establish change into the triangle coal body identical with head-room up to the complete thick coal column in coal seam, weakened the mechanical correlation of tunnel and overlying rock, coal is decreased reduce and the tunnel is easy to maintenance.Under this roadway system, adopt the syllogic process for stoping that adapts with it.The employing of syllogic process for stoping can change the phenomenon that the work plane two ends is lost coal greatly, increases substantially coal mining rate.Because this system has cancelled section coal pillar, its coal mining rate not only is higher than general top coal caving, and is higher than the separate zone production of staying section coal pillar, has kept simultaneously the advantage of high-yield and high-efficiency.Simultaneously, land subsidence is tended towards stability evenly, reduced adverse effect.The driving of section road and maintenance condition improve, and the return aircourse of arranging along top board more is conducive to the ventilation methane.
The residual coal in low coverage inflammable seam goaf is combined and is put the second mining technology, has not only improved the coal resources rate of extraction, has accumulated experience for reclaiming the residual coal of Overburden gob area, has established solid foundation for promoting the method under the same or similar condition.
Claims (1)
1. the residual coal in low coverage inflammable seam goaf is combined and is put the second mining method, it is characterized in that adopting underlying seam and puts and cover coal column, may further comprise the steps:
(1) roadway workface is arranged
Adopt the staggered floor tunnel to arrange method, i.e. air intake transportation lane is positioned at underlying seam, with end driving; Return air haul lane is arranged in covers the coal seam, with the top driving;
(2) coal-mining method
Work plane adopts two to adopt one and put with one and adopt one and put the technological process that combines, and two did not adopt one and put when whole layer was adopted, and one adopted one and puts coal cutting step pitch 0.6m, unit advance 0.6m when layering was adopted; Specifically comprise:
1) termination lapping
Lay the top net at face end, lapping was carried out before coal cutting, adopted the metal rhombus net of 7500 * 700mm; During lapping, long limit is parallel to work plane, overlaps 100mm between net and the net, and networking adopts the iron wire of bifilar long 300mm to kink, and connects a place every a hole, and every place three circles of twisting together at least, net connection retract net after well and sling;
2) feed
Adopt head, tail to cut the feed mode of cutting sth. askew of Triangle Coal;
3) coal cutting
After the coal-winning machine feed, enter normal coal cutting state, adopt front roll to cut the top coal during coal cutting, back roll cuts the method for ground coal and carries out operation;
4) stretch extensible canopy
After the coal mining machine cut is crossed coal, stretch out the support extensible canopy apart from coal-winning machine front roll 2-3 frame, in time protect top, machine road top board, prevent inbreak;
5) move frame
The mode operation of adopting this operation, the machine of chasing after to move frame, 2-3 sliding advance of support of hysteresis coal-winning machine back roll;
6) pass anterior conveyer
Use hydraulic support foundation middle part advancing jack is passed anterior conveyer, and with adopting the machine cut coal, the machine of chasing after begins the top slide after pulling out 10 framves, top slide step pitch 0.6m;
7) Sub-Level Caving
Adopt single-wheel sequentially to put coal, drawing interval 0.6m is put coal after utilizing the loosening top board of mode that roof pressure, support support repeatedly, the support tail boom swings up and down and reclaim plate, until see till the superjacent top board limestone spoil;
8) draw and move the rear portion conveyer
Use the other hydraulic jack of hydraulic support foundation to draw and move the rear portion conveyer, discharge the top coal after, begin to draw and move the rear portion conveyer apart from putting coal point 15m, draw and move one's steps apart from 0.6m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210384329.3A CN102900438B (en) | 2012-10-12 | 2012-10-12 | Residual coal full-mechanized repeated mining method of near-distance inflammable seam gob |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210384329.3A CN102900438B (en) | 2012-10-12 | 2012-10-12 | Residual coal full-mechanized repeated mining method of near-distance inflammable seam gob |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102900438A true CN102900438A (en) | 2013-01-30 |
| CN102900438B CN102900438B (en) | 2014-11-19 |
Family
ID=47572895
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210384329.3A Active CN102900438B (en) | 2012-10-12 | 2012-10-12 | Residual coal full-mechanized repeated mining method of near-distance inflammable seam gob |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102900438B (en) |
Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103266893A (en) * | 2013-05-08 | 2013-08-28 | 中国矿业大学(北京) | Application of non-coal-pillar coal mining method in under-protected stratum exploitation |
| CN103742149A (en) * | 2014-01-22 | 2014-04-23 | 太原理工大学 | Method for re-mining residual floor coal in fully-mechanized top coal caving face |
| CN104033151A (en) * | 2014-05-26 | 2014-09-10 | 辽宁工程技术大学 | Safe mining method of ten million-ton mine under complicated conditions of dual-system coal seams |
| CN104088637A (en) * | 2014-04-04 | 2014-10-08 | 太原理工大学 | Method for second mining of upper-group shallow residual coal under coal seam group conditions |
| CN104879162A (en) * | 2015-05-29 | 2015-09-02 | 中国矿业大学(北京) | Reasonable gangue dropping and gob-side entry retaining method of top coal caving face |
| CN104963687A (en) * | 2015-07-09 | 2015-10-07 | 太原理工大学 | Method for recycling upper part residual coal and backfilling goaf by utilizing full-mechanized caving mining in extremely thick coal seam |
| CN105715272A (en) * | 2016-04-06 | 2016-06-29 | 中国神华能源股份有限公司 | Fully-mechanized caving mining method for lower slice of ultra-thick hard coal |
| CN105715273A (en) * | 2016-04-06 | 2016-06-29 | 中国神华能源股份有限公司 | Arrangement form of lower slice roadways of ultra-thick hard coal |
| CN105888664A (en) * | 2016-04-06 | 2016-08-24 | 中国神华能源股份有限公司 | Mining method for extremely-thick hard coal |
| CN106014413A (en) * | 2016-07-12 | 2016-10-12 | 中国矿业大学(北京) | Method for implementing combined supporting on goaf-along driven roadway and adjacent roadway in thick coal layer |
| CN108086976A (en) * | 2017-12-11 | 2018-05-29 | 中国矿业大学(北京) | The method of low-angle dip, inclined super high seam full-seam mining top coal caving |
| CN108952719A (en) * | 2018-07-09 | 2018-12-07 | 山东省煤炭技术服务有限公司 | Coal seam gasification second mining loses the method for coal under the conditions of a kind of longwall top coal caving |
| CN108952716A (en) * | 2018-06-22 | 2018-12-07 | 太原理工大学 | A kind of more lane method for arranging in high seam coal wall |
| CN109915144A (en) * | 2019-04-17 | 2019-06-21 | 中国矿业大学 | A kind of high inclination-angle split coal is comprehensive to put and turns fully mechanized mining and continuously promote recovery method |
| CN110173238A (en) * | 2019-05-27 | 2019-08-27 | 中国矿业大学(北京) | The anti-reflection extraction of high seam three-dimensional roadway layout networking explosion thick gas method entirely |
| CN110700830A (en) * | 2019-11-20 | 2020-01-17 | 中国矿业大学(北京) | Mining method for improving hard or extra-thick caving coal recovery rate |
| CN113404492A (en) * | 2021-07-22 | 2021-09-17 | 河南神火煤电股份有限公司 | Fully-mechanized mining working face soft channel dust settling system and method |
| CN114636807A (en) * | 2022-05-20 | 2022-06-17 | 太原理工大学 | Physical simulation experiment system for gas migration of coal rock system in mining process |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1190693A (en) * | 1998-02-18 | 1998-08-19 | 中国矿业大学（北京校区） | All thickness coal mining method for seam misplaced coal tunnel distribution on thick seam |
| CN1558090A (en) * | 2004-02-10 | 2004-12-29 | 中国矿业大学（北京校区） | Three step type stope technique for thick coal seam overall height mining |
-
2012
- 2012-10-12 CN CN201210384329.3A patent/CN102900438B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1190693A (en) * | 1998-02-18 | 1998-08-19 | 中国矿业大学（北京校区） | All thickness coal mining method for seam misplaced coal tunnel distribution on thick seam |
| CN1558090A (en) * | 2004-02-10 | 2004-12-29 | 中国矿业大学（北京校区） | Three step type stope technique for thick coal seam overall height mining |
Non-Patent Citations (4)
| Title |
|---|
| 崔国亮: "《白家庄矿近距离易燃煤层合采综放技术研究》", 《中国优秀硕士学位论文全文数据库 工程科技Ⅰ辑》 * |
| 张俊文等: "《近距残煤综放复采顶煤损伤与冒放性控制》", 《煤炭学报》 * |
| 李玫斯等: "《近距离上覆煤层刀柱开采后下覆煤层长壁开采技术》", 《煤矿现代化》 * |
| 白培中: "《近距离煤层采空区残煤综放复采技术研究与应用》", 《中国煤炭》 * |
Cited By (25)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103266893B (en) * | 2013-05-08 | 2015-08-12 | 中国矿业大学(北京) | Without the application of coal column coal-mining method in lower protective seam mining |
| CN103266893A (en) * | 2013-05-08 | 2013-08-28 | 中国矿业大学(北京) | Application of non-coal-pillar coal mining method in under-protected stratum exploitation |
| CN103742149B (en) * | 2014-01-22 | 2015-10-28 | 太原理工大学 | A kind of combining puts the method that second mining remains ground coal |
| CN103742149A (en) * | 2014-01-22 | 2014-04-23 | 太原理工大学 | Method for re-mining residual floor coal in fully-mechanized top coal caving face |
| CN104088637A (en) * | 2014-04-04 | 2014-10-08 | 太原理工大学 | Method for second mining of upper-group shallow residual coal under coal seam group conditions |
| CN104033151A (en) * | 2014-05-26 | 2014-09-10 | 辽宁工程技术大学 | Safe mining method of ten million-ton mine under complicated conditions of dual-system coal seams |
| CN104879162A (en) * | 2015-05-29 | 2015-09-02 | 中国矿业大学(北京) | Reasonable gangue dropping and gob-side entry retaining method of top coal caving face |
| CN104963687B (en) * | 2015-07-09 | 2017-02-22 | 太原理工大学 | Method for recycling upper part residual coal and backfilling goaf by utilizing full-mechanized caving mining in extremely thick coal seam |
| CN104963687A (en) * | 2015-07-09 | 2015-10-07 | 太原理工大学 | Method for recycling upper part residual coal and backfilling goaf by utilizing full-mechanized caving mining in extremely thick coal seam |
| CN111946345A (en) * | 2016-04-06 | 2020-11-17 | 中国神华能源股份有限公司 | Fully-mechanized caving mining method for layering under ultra-thick hard coal |
| CN105715273A (en) * | 2016-04-06 | 2016-06-29 | 中国神华能源股份有限公司 | Arrangement form of lower slice roadways of ultra-thick hard coal |
| CN105715272A (en) * | 2016-04-06 | 2016-06-29 | 中国神华能源股份有限公司 | Fully-mechanized caving mining method for lower slice of ultra-thick hard coal |
| CN105888664A (en) * | 2016-04-06 | 2016-08-24 | 中国神华能源股份有限公司 | Mining method for extremely-thick hard coal |
| CN106014413A (en) * | 2016-07-12 | 2016-10-12 | 中国矿业大学(北京) | Method for implementing combined supporting on goaf-along driven roadway and adjacent roadway in thick coal layer |
| CN108086976A (en) * | 2017-12-11 | 2018-05-29 | 中国矿业大学(北京) | The method of low-angle dip, inclined super high seam full-seam mining top coal caving |
| CN108952716A (en) * | 2018-06-22 | 2018-12-07 | 太原理工大学 | A kind of more lane method for arranging in high seam coal wall |
| CN108952719A (en) * | 2018-07-09 | 2018-12-07 | 山东省煤炭技术服务有限公司 | Coal seam gasification second mining loses the method for coal under the conditions of a kind of longwall top coal caving |
| CN109915144B (en) * | 2019-04-17 | 2020-04-28 | 中国矿业大学 | Large-dip-angle branched coal seam fully-mechanized caving-to-fully-mechanized mining continuous propelling mining method |
| CN109915144A (en) * | 2019-04-17 | 2019-06-21 | 中国矿业大学 | A kind of high inclination-angle split coal is comprehensive to put and turns fully mechanized mining and continuously promote recovery method |
| CN110173238A (en) * | 2019-05-27 | 2019-08-27 | 中国矿业大学(北京) | The anti-reflection extraction of high seam three-dimensional roadway layout networking explosion thick gas method entirely |
| CN110700830A (en) * | 2019-11-20 | 2020-01-17 | 中国矿业大学(北京) | Mining method for improving hard or extra-thick caving coal recovery rate |
| CN113404492A (en) * | 2021-07-22 | 2021-09-17 | 河南神火煤电股份有限公司 | Fully-mechanized mining working face soft channel dust settling system and method |
| CN113404492B (en) * | 2021-07-22 | 2023-08-08 | 河南神火煤电股份有限公司 | Soft channel dust fall system and method for fully mechanized coal mining face |
| CN114636807A (en) * | 2022-05-20 | 2022-06-17 | 太原理工大学 | Physical simulation experiment system for gas migration of coal rock system in mining process |
| CN114636807B (en) * | 2022-05-20 | 2022-08-02 | 太原理工大学 | Physical simulation experiment system for gas migration of coal rock system in mining process |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102900438B (en) | 2014-11-19 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102900438B (en) | Residual coal full-mechanized repeated mining method of near-distance inflammable seam gob | |
| CN101328809B (en) | Non-bottom pillar deep hole falling-back type mining method | |
| CN102518438B (en) | Roof regeneration medium-length hole ore blast backfill mining method | |
| CN101967975B (en) | Fully-mechanized caving mining process technology with large mining height in super-high seam (14-20m) | |
| CN108868771B (en) | Mining method for horizontal medium-length hole stoping of inclined medium-thickness ore body | |
| CN106761912B (en) | It is a kind of be suitable for unstable formation efficiently on to route slicing and filling mining methods | |
| CN102251773B (en) | Route type upward horizontal layered filling mining method suitable for extremely complex ore body mining | |
| CN102094647B (en) | Safe and efficient fully-mechanized mining method for thin coal seam under two hard conditions | |
| CN103089266A (en) | Drift-pillar-free sublevel barnyard caving mining method of open pit transferred underground transitional period | |
| CN102261249B (en) | Creasing-type sill-pillar-free stage caving stopping method based on steel structured artificial top | |
| CN104033151A (en) | Safe mining method of ten million-ton mine under complicated conditions of dual-system coal seams | |
| CN100441831C (en) | Ladder type mining method using united pillars to support roof and partition stope | |
| CN106499396A (en) | The thick low-angle dip ore block house column mining codes of interlayer containing barren rock in one kind | |
| CN103982186B (en) | The vertical Inclined strips sublevel caving of oper cylinler retrusive | |
| CN103726848B (en) | Be applicable to the mining methods of recovery of gentle-inclined/inclthin thin ore body | |
| CN104675399A (en) | Coal mining and filling integrated method for coal mine | |
| CN110410076A (en) | A kind of filling mining method for leaving Pillar Recovery for old pillars of a house goaf | |
| CN102011590B (en) | Mine down-hole double-stope bottom structure | |
| CN102418528B (en) | End ore-drawing caving mining technology with steel concrete composite man-made false roofs | |
| CN115853514A (en) | Reserved interval type ore pillar downward access filling mining method | |
| CN105888664A (en) | Mining method for extremely-thick hard coal | |
| CN115653602A (en) | Reserved interval type pillar upward access filling mining method | |
| CN102419139B (en) | Bottom-post-free sublevel caving method adopting reinforced concrete structure artificial false roof | |
| CN102305073B (en) | Sill pillar staged caving stoping method with single route projecting eaves structure | |
| CN1607316A (en) | Top-coal caving method with horizontal sectional light-support in steep and close seams |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |